LAS点云坐标及格式多线程转换方法  

Multi-Threaded Conversion Method of Point Cloud Coordinates and Format Based on LAS-Format

作　　者：钱承军 戴相喜 丁圳祥 QIAN Cheng-jun;DAI Xiang-xi;DING Zhen-xiang(FAW(Nanjing)Technology Development Co.Ltd.,Nanjing Jiangsu 211100,China;Nanjing Insititute of Surveying,Mapping&Geotechnical Investigation,Co.Ltd.,Nanjing Jiangsu 210019,China)

机构地区：[1]一汽〔南京〕科技开发有限公司,江苏南京211100 [2]南京市测绘勘察研究院股份有限公司,江苏南京210019

出　　处：《现代测绘》2024年第5期51-55,共5页Modern Surveying and Mapping

摘　　要：利用架站式扫描、车载激光扫描和机载LiDAR激光扫描等不同方式采集点云数据时,获取的点云数据坐标及格式因采集设备的不同而不尽相同。为了使点云更便捷地运用于项目生产与数据共享,提出了一种对通用格式(LAS)点云进行多线程坐标及格式转换的方法,解决了点云坐标系不同导致的共享处理瓶颈,实现了点云坐标系及目标文件格式的统一;基于多线程技术进行转换,实现了文件批量转换,提高了数据处理效率。实际测试结果表明:所提出的方法,有效节约数据处理时间,解决数据交换时坐标与格式壁垒,满足不同项目生产需求,为点云数据的生产、共享交换和存档入库提供便利。When collecting point cloud data in different ways such as rack-mounted scanning,vehicle-mounted laser scanning,and airborne LiDAR laser scanning,the coordinates and format of the acquired point cloud data are different due to different collection equipment.In order to make the point cloud more convenient for project production and data sharing,and a method for multi-threaded coordinate and format conversion of common format(LAS)point clouds is proposed,which solves the sharing processing bottleneck caused by different point cloud coordinate systems,and realizes the unification of point cloud coordinate systems and target file formats;conversion based on multi-threading technology realizes batch conversion of multiple files at the same time,which improves the efficiency of data processing.The actual test results show that the proposed method effectively saves data processing time,solves coordinate and format barriers during data exchange,meets the production needs of different projects,and facilitates the production,sharing,exchange,and archiving of point cloud data.

关 键 词：多线程 三维激光扫描 坐标及格式转换 

分 类 号：P226.3[天文地球—大地测量学与测量工程] P225.2[天文地球—测绘科学与技术]